Local voltage regulation in LV distribution networks with PV distributed generation

Abstract

The increasing connection of distributed generation (DG) in distribution networks may affect the quality of power offered to customers. One of the most relevant issues is the possibility to have unacceptable voltage rise at the point of common coupling (PCC). This work focuses on the problem of voltage control in LV distribution networks in the presence of photovoltaic (PV) DG. The paper presents a local voltage control strategy based on PV generation curtailment as an alternative to on/off operation, typically required by distribution operators to prevent overvoltage at the PCCs by means of overvoltage protections embedded in the PV unit. To show the effect of the proposed local voltage control, a simulation tool, developed in MATLABreg Simulinkreg environment, has been implemented by means of appropriate numerical models for network components and PV generators